Is CVE-2016-4356 in the CISA KEV catalog?

No. CVE-2016-4356 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-4356?

CVE-2016-4356 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2016-4356?

CVE-2016-4356 has an EPSS score of 2.93% (85th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-4356?

Upgrade libksba on debian 11 to 1.3.3-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2016-4356

HIGHEPSS 85th pctl

7.5

CVSS v3

NVD

Description

The append_utf8_value function in the DN decoder (dn.c) in Libksba before 1.3.3 allows remote attackers to cause a denial of service (out-of-bounds read) by clearing the high bit of the byte after invalid utf-8 encoded data.

CWE-119Buffer Overflow

How to fix

Remediation Available

libksbaDebian

Fixed in:1.3.3-1CVE-2016-4356

libksbaUbuntu

Fixed in:1.3.0-3ubuntu0.14.04.2USN-2982-1

Fixed in:1.3.3-1ubuntu0.16.04.1USN-2982-1

libksba8Ubuntu

Fixed in:1.3.0-3ubuntu0.14.04.2USN-2982-1

Fixed in:1.3.3-1ubuntu0.16.04.1USN-2982-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

2.93%probability of exploitation in 30 days

85thpercentile

Elevated risk: more likely to be exploited than 85% of all known CVEs.

References

Other references6

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.